Send OTP confirmation code alter login using REST API

1

With Postman I tried to create a request(like a React SPA app) to generate token:

POST: http://123.123.123.123:8080/realms/admin_console_realm/protocol/openid-connect/token?client_id=admin_console_client&grant_type=password

I get response:

{
    "access_token": "eyJhb....X8N8ulVbQ",
    "expires_in": 300,
    "refresh_expires_in": 1800,
    "refresh_token": "eyJhbGc....Q",
    "token_type": "Bearer",
    "not-before-policy": 0,
    "session_state": "5595860d-35d8-4fe1-9f6f-147c38255172",
    "scope": "email profile"
}

What should be the proper way to send a username and password and then to use confirmation code (OTP code) received by e-mail for Keycloak 21?